BestKeys 04SI-R Keyless Entry Brand New Keyless Entry Remote Key Fob for 2004 Chevrolet Silverado 1500 2500 3500 Remote requires 1 working key to program. We will provide a link to our website with Free Do-It-Yourself instructions with your order. Every single remote is tested before it is sent to make sure it is transmitting. Replacement for part numbers: 21997127, 15186200 #1, 15186201 #2, 15132197 #1, 15132198 #2, 10377295, 22730827, 15186203, FCC ID: LHJ011 New complete working remote with all electronics and batteries included plus FREE tech support with every order.